Logic 9 Tempo changes in midi file stay when measures are cut.

Hello, I am using Logic for editing some midi files and have noticed that when I cut 20 measures from the middle, the tempo changes remain even though the notes are now different. It seems that the tempo changes are attached to the bar numbers and not the music in the bars. How do I delete those 20 measures worth of tempo changes?
Thanks!

Yes, tempo changes are not attached to notes. You need to use Edit: Cut/Insert Time > Snip between locators. First select all and select the start and end of the snip (Using a cycle region is a convenient way to quickly set the left and right locators.